Method and device for selecting a sound algorithm

A sound and algorithm technology, which is applied in the field of selecting sound algorithms for processing audio signals, and can solve problems such as manually setting sound algorithms

Inactive Publication Date: 2011-08-03
GRUNDIG E M V ELEKTRO MECHANISCHE VERSUCHSANSTALT MAX GRUNDIG HOLLAND STIFTUNG & CO KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] But the disadvantage of all disclosed inventions is that the choice of sound algorithm has to be set manually

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  • Method and device for selecting a sound algorithm
  • Method and device for selecting a sound algorithm

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Embodiment Construction

[0019] The invention solves the object by recognizing the type of the audio signal and assigning an automatic setting of the sound algorithm as a function of the type recognition of the audio signal.

[0020] To identify the type of audio signal, different metrics are defined and analyzed.

[0021] As a first measure, it is determined what kind of dynamics is currently present in the audio signal. The dynamics are determined by squaring the sampled values ​​of the left and right audio channels, summing and filtering the resulting signal through a low-pass filter. The low pass filter preferably has a cutoff frequency of about 3 Hz. Over a defined duration, preferably for example 5 seconds, the minimum and maximum values ​​of the audio signal are determined within this time frame. The currently existing dynamic range in decibels then corresponds to 10 times the logarithmic difference of the two values.

[0022] In a further preferred embodiment of the invention, the dynamics ...

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Abstract

The invention relates to a method for selecting a sound algorithm for processing an audio signal. The audio signal is analyzed and the type of audio signal is ascertained based on the analysis. The audio signal is classified as a music signal or another signal, and different sound algorithms are used for the further processing and subsequent output of the audio signal based on the classification.

Description

technical field [0001] The invention relates to a method and a device for selecting a sound algorithm for processing an audio signal. Background technique [0002] Modern Hifi devices are equipped with different sound programs which allow: to distribute the audio signal in stereo to more than two speakers or to produce stereo in addition. Thus, for example, after the audio signal has been decoded, it is broken down into five individual audio channels and used by a so-called "virtualizer" for reproduction via only two loudspeakers. Furthermore, special "virtualizers" are disclosed which convert audio signals for playback specifically through headphones. [0003] One of the most familiar methods for this is the so-called "Dolby ProLogic" method, which is basically employed in film material in order to be able to influence the localization of the sound. Voice is therefore usually mapped onto the center channel, while noise can only come from the rear speakers. [0004] In ad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04S1/00H04S5/02H04S7/00
CPCH04S1/00
Inventor D·舒尔茨
Owner GRUNDIG E M V ELEKTRO MECHANISCHE VERSUCHSANSTALT MAX GRUNDIG HOLLAND STIFTUNG & CO KG
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